The most important thing before ordering a jersey is confirming you're buying the exact version you want, because a jersey has more variables than almost any other garment: the season, the fan versus player cut, the name and number, and the correct competition patches. Nail those at the order stage, then verify them in Kakobuy's QC photos before you approve.
Start with the version. Fan (replica) and player (authentic) versions differ in fabric, fit, and crest style, and they're often sold side by side. A player-issue jersey is slimmer and uses a thinner, more technical fabric, while a fan version is roomier and heavier. Know which one the listing is selling before you buy.
Then work the QC photos through a specific checklist:
Sizing on jerseys runs differently from casual wear and often trends slim, especially player cuts, so don't assume your usual size. Use the listing's measurement chart and compare against a shirt you own. Asian sizing on some listings runs a size small.
Because jerseys are light, they're not worth shipping one at a time. Use Kakobuy's free storage to hold a jersey while you gather other items, then consolidate into one box so shipping is shared. If you're buying several jerseys or building a set, letting them accumulate and ship together is the practical approach, and it gives you time to check each QC set carefully rather than rushing an approval.